I really enjoy rhythm games as well. Especially the Bemani stuff like DDR, IIDX, and most definitely Sound Voltex. The last one in particular got me to buy a custom controller and jumping through Konami's hoops just so I can play it at home instead of having to go out of state just to play it at a Round1 arcade.

As for games I hate... well, I tend to dislike those who aim for being more art than game. Mostly because of the community around said games... But other than that, it's hard for me to come up with a game I truly despised. Even games that are generally considered bad by the community at large I usually tend to enjoy to some extent.